A5101730703- Hydraulic Fracturing and Reservoir Analysis
- Drilling and Well Engineering
- Enhanced Oil Recovery Techniques
- Higher Education and Teaching Methods
- Simulation and Modeling Applications
- Network Time Synchronization Technologies
- Advanced Measurement and Detection Methods
- Adaptive Control of Nonlinear Systems
- Sensorless Control of Electric Motors
- Stability and Control of Uncertain Systems
- Hydrocarbon exploration and reservoir analysis
- NMR spectroscopy and applications
- Geotechnical and Geomechanical Engineering
- Mobile Agent-Based Network Management
- Teleoperation and Haptic Systems
- Advanced Sensor and Control Systems
- Fluid Dynamics and Heat Transfer
- Regional Development and Environment
- Electric Power Systems and Control
- Fluid Dynamics and Turbulent Flows
- Educational Technology and Pedagogy
- Advanced Data Compression Techniques
- Robot Manipulation and Learning
- Service-Oriented Architecture and Web Services
- Blind Source Separation Techniques
Gubkin Russian State University of Oil and Gas
2016-2020
University of Science and Technology Beijing
2012-2014
Shandong Jiaotong University
2012
Yangtze University
2007-2011
Shanghai Institute of Technology
2007-2008
Yangon University of Economics
2003
Beijing Normal University
2003
The impedance control for coordinated robots interacting with the unknown environment is investigated in this article, subject to system dynamics and which come into contact. For whole system, developed robots. notable feature that robot-environment interaction performance improved without any information about environment, so robotic follows commanded position trajectory noncontact phase, while desired destination obtained according force exerted on during contact phase. Moreover, based...
The experimental work in this paper investigated the effect of microwave energy on pore structure and gas permeability coal cores. Fifteen samples were irradiated under condition 2.45 GHz with 6 kW. irradiation was evaluated by nuclear magnetic resonance (NMR). water saturation degree has little influence transverse relaxation time (<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"...
A challenging issue in Networked Control Systems (NCSs) is how to compensate the effect made by network-induced delays. In this paper, a control scheme proposed for compensating effects of delays between sensor and controller actuator within loop. The key idea that knowledge plant dynamics used reduce usage network. Experimental results show method well guarantees stability system.
Abstract Correlations for the interface roughness are proposed conditions without or with disturbance waves vertical annular flow. The decisive role of in interfacial friction factor is specified through a comparison ten correlations an experimental database. effect wave on analyzed to figure out influence parameters, which superficial gas and liquid Reynolds numbers core film waves. improve prediction precision factor, especially smooth transitional regimes.
A method is proposed to compensate the effects made by delays both from sensor controller and actuator within a control loop in networked system. The compensation designed based on online delay between an integrated manner of communication technology. basic idea reduction waiting time data tasks transmitted network, realisation accuracy predicted delays. Experimental results show that meets needs static performance, at same time, well guarantees stability
Spatial orientation and magnitude of the rotor flux is essential for vector control induction motor. Traditionally, current model serves estimation must be measured by speed sensor. Due to advantages low cost high reliability, motor without sensor draws great attention scholars around world. Closed-loop observers or open-loop estimators are used such purpose. In this paper a new method sensorless proposed simulation implemented verify scheme.
Self-sensing control of permanent magnet synchronous motor has been a hot research topic technology, which the advantages low cost and high reliability. The use high-frequency carrier signal superimposed on fundamental excitation PMSM established itself in recent years as viable means eliminating position sensors ac drives for applications. In injection methods, rotor can be estimated by using current resulting from interaction between voltage spatial saliency. existing sampling error random...
The paper analyzes the Region Partitioning Method of highway pavement distress image and gives a new region partitioning method its specific operation steps.
This text have further discussed the audio frequency compression based on wavelet packet decomposition and optimize choice of optimum proposed a optimized self-adaptive adopted zerotree coding psycho-acoustic model, which makes this system higher ratio than signal can keep good real-time objective recovery to noise ratio. Computer simulation test is made for calculation with Matlab,and has proved point that mentioned in text.
Abstract The formation of Section B, which is on the right bank Amu Darya consist high pressure salt and gypsum formation. average thickness salt-gypsum layer about 900 meters, maximum coefficient 2.3 g/cm3, rock easy to creep, resolve, crystallize. close reservoir. Wellbore path difficult control. drilling accident rate 34%, success brine 0, leads fact that no horizontal well has been carried out. In order develop safety technology, it necessary carry out large angle orientation method in...